CVE-2024-33999: Moodle/moodle Moodle Improper Input Validation Vulnerability

HIGH
Advisory Identifier: GHSA-r2wx-46gp-rp3h
Share
CWE-20
Published
Advisory Summary

CVE-2024-33999 is a HIGH moodle improper input validation vulnerability (CWE-20: Improper Input Validation) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle improper input validation. Remediation is available by upgrading affected packages to version 4.3.4.

CVE-2024-33999 at a Glance

CVE Identifier CVE-2024-33999
GHSA Identifier GHSA-r2wx-46gp-rp3h
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-20: Improper Input Validation
Affected Product Moodle/moodle
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2024-33999

To remediate this vulnerability, upgrade all affected Moodle/moodle dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

moodle/moodle fixed: 4.3.4 
Upgrade moodle/moodle to 4.3.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for moodle/moodle

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-33999, inspect your project dependencies for Moodle/moodle:

inspect dependencies for moodle/moodle

Analyze the terminal output to locate any version of Moodle/moodle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.3.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Moodle/moodle, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php. The referrer URL used by MFA required additional sanitizing, rather than being used directly.

CVE-2024-33999 Affected Moodle/moodle Versions

1 component(s)
Fixed Versions:
4.3.4
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
≥ 4.3.0
< 4.3.4
4.3.4

References

NVD — CVE-2024-33999 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-33999
Moodle/moodle Source Repository REPOSITORY
https://github.com/moodle/moodle
moodle.org/mod/forum/discuss.p... WEB
https://moodle.org/mod/forum/discuss.php?d=458387
git.moodle.org/gw WEB
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-80878

Frequently Asked Questions

What is CVE-2024-33999?
CVE-2024-33999 is a security vulnerability in Moodle/moodle involving Moodle Improper Input Validation under CWE-20: Improper Input Validation.
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 4.3.4 across affected packages: moodle/moodle.
What version fixes CVE-2024-33999?
Upgrading to 4.3.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is moodle/moodle affected?
Yes, moodle/moodle is affected in releases prior to 4.3.4. Upgrade your dependency to 4.3.4 or later.
What CWE is associated with CVE-2024-33999?
CVE-2024-33999 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Packagist dependencies for CVE-2024-33999?
Run the dependency tree command: 'inspect dependencies for moodle/moodle'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-r2wx-46gp-rp3h",
  "modified" : "2024-06-04T15:52:11Z",
  "published" : "2024-05-31T21:30:53Z",
  "aliases" : [ "CVE-2024-33999" ],
  "summary" : "Moodle Improper Input Validation",
  "details" : "Unsafe direct use of $_SERVER['HTTP_REFERER'] in admin/tool/mfa/index.php. The referrer URL used by MFA required additional sanitizing, rather than being used directly.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.3.0"
      }, {
        "fixed" : "4.3.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-33999"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
  }, {
    "type" : "WEB",
    "url" : "https://moodle.org/mod/forum/discuss.php?d=458387"
  }, {
    "type" : "WEB",
    "url" : "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-80878"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-06-04T15:52:11Z",
    "nvd_published_at" : "2024-05-31T20:15:09Z"
  }
}